feat(ThemeProvider): support auto mode

src/BootstrapBlazor.Server/Components/App.razor

@@ -23,7 +23,6 @@
     <Link Href="_content/BootstrapBlazor/css/motronic.min.css" />
     <Link Href="BootstrapBlazor.Server.styles.css" />
     <Link Href="css/site.css" />
-    <ThemeLoader></ThemeLoader>
     <HeadOutlet @rendermode="new InteractiveServerRenderMode(false)" />
     <title>@Localizer["Title"]</title>
 </head>

src/BootstrapBlazor.Server/Components/Components/Header.razor.cs

@@ -57,5 +57,5 @@ protected override void OnInitialized()
         _versionString = $"v{PackageVersionService.Version}";
     }
 
-    private Task OnThemeChangedAsync(string themeName) => InvokeVoidAsync("updateTheme", themeName);
+    private Task OnThemeChangedAsync(ThemeValue themeName) => InvokeVoidAsync("updateTheme", themeName);
 }

src/BootstrapBlazor.Server/Controllers/Api/LoginController.cs

@@ -9,30 +9,18 @@
 namespace BootstrapBlazor.Server.Controllers.Api;
 
 /// <summary>
-/// 
+/// 登录控制器
 /// </summary>
 [Route("api/[controller]")]
 [AllowAnonymous]
 [ApiController]
 public class LoginController : ControllerBase
 {
     /// <summary>
-    /// 
+    /// 认证方法
     /// </summary>
     /// <param name="user"></param>
     /// <returns></returns>
     [HttpPost]
-    public IActionResult Post(User user)
-    {
-        IActionResult? response;
-        if (user.UserName == "admin" && user.Password == "123456")
-        {
-            response = new JsonResult(new { Code = 200, Message = "登录成功" });
-        }
-        else
-        {
-            response = new JsonResult(new { Code = 500, Message = "用户名或密码错误" });
-        }
-        return response;
-    }
+    public IActionResult Post(User user) => user is { UserName: "admin", Password: "123456" } ? new JsonResult(new { Code = 200, Message = "登录成功" }) : new JsonResult(new { Code = 500, Message = "用户名或密码错误" });
 }

src/BootstrapBlazor/Components/ThemeProvider/ThemeProvider.razor.cs

@@ -69,7 +69,19 @@ public partial class ThemeProvider
     /// 获得/设置 主题切换回调方法
     /// </summary>
     [Parameter]
-    public Func<string, Task>? OnThemeChangedAsync { get; set; }
+    public Func<ThemeValue, Task>? OnThemeChangedAsync { get; set; }
+
+    /// <summary>
+    /// 主题类型
+    /// </summary>
+    [Parameter]
+    public ThemeValue ThemeValue { get; set; } = ThemeValue.UseLocalStorage;
+
+    /// <summary>
+    /// 主题类型改变回调方法
+    /// </summary>
+    [Parameter]
+    public EventCallback<ThemeValue> ThemeValueChanged { get; set; }
 
     [Inject, NotNull]
     private IIconTheme? IconTheme { get; set; }
@@ -107,16 +119,21 @@ protected override void OnParametersSet()
     /// <inheritdoc/>
     /// </summary>
     /// <returns></returns>
-    protected override Task InvokeInitAsync() => InvokeVoidAsync("init", Id, Interop, OnThemeChangedAsync != null ? nameof(OnThemeChanged) : null);
+    protected override Task InvokeInitAsync() => InvokeVoidAsync("init", Id, Interop, ThemeValue, nameof(OnThemeChanged));
 
     /// <summary>
     /// JavaScript 回调方法
     /// </summary>
     /// <param name="name"></param>
     /// <returns></returns>
     [JSInvokable]
-    public async Task OnThemeChanged(string name)
+    public async Task OnThemeChanged(ThemeValue name)
     {
+        if (ThemeValueChanged.HasDelegate)
+        {
+            await ThemeValueChanged.InvokeAsync(name);
+        }
+
         if (OnThemeChangedAsync != null)
         {
             await OnThemeChangedAsync(name);

src/BootstrapBlazor/Components/ThemeProvider/ThemeProvider.razor.js

@@ -1,37 +1,56 @@
-import { getAutoThemeValue, getPreferredTheme, setActiveTheme, switchTheme } from "../../modules/utility.js"
+import { getPreferredTheme, setTheme, switchTheme } from "../../modules/utility.js"
 import EventHandler from "../../modules/event-handler.js"
+import Data from "../../modules/data.js"
 
-export function init(id, invoke, callback) {
+export function init(id, invoke, themeValue, callback) {
     const el = document.getElementById(id);
-    if (el) {
-        const currentTheme = getPreferredTheme();
-        const activeItem = el.querySelector(`.dropdown-item[data-bb-theme-value="${currentTheme}"]`);
-        if (activeItem) {
-            setActiveTheme(el, activeItem);
-        }
+    if (el === null) {
+        return;
+    }
+
+    const theme = { el };
+    Data.set(id, theme);
+
+    const darkModeMediaQuery = window.matchMedia('(prefers-color-scheme: dark)');
+    EventHandler.on(darkModeMediaQuery, 'change', () => changeTheme(id));
+    theme.mediaQueryList = darkModeMediaQuery;
 
-        const items = el.querySelectorAll('.dropdown-item');
-        items.forEach(item => {
-            EventHandler.on(item, 'click', () => {
-                setActiveTheme(el, item);
-
-                let theme = item.getAttribute('data-bb-theme-value');
-                if (theme === 'auto') {
-                    theme = getAutoThemeValue();
-                }
-                switchTheme(theme, window.innerWidth, 0);
-                if (callback) {
-                    invoke.invokeMethodAsync(callback, theme);
-                }
-            });
-        });
+    let currentTheme = themeValue;
+    if (currentTheme === 'useLocalStorage') {
+        currentTheme = getPreferredTheme();
     }
+    setTheme(currentTheme, true);
+    theme.currentTheme = currentTheme;
+
+    EventHandler.on(el, 'click', '.dropdown-item', e => {
+        const activeTheme = e.delegateTarget.getAttribute('data-bb-theme-value');
+        theme.currentTheme = activeTheme;
+        switchTheme(activeTheme, window.innerWidth, 0);
+        if (callback) {
+            invoke.invokeMethodAsync(callback, activeTheme);
+        }
+    });
 }
 
 export function dispose(id) {
-    const el = document.getElementById(id);
-    const items = el.querySelectorAll('.dropdown-item');
-    items.forEach(item => {
-        EventHandler.off(item, 'click');
-    });
+    const theme = Data.get(id);
+    if (theme === null) {
+        return;
+    }
+    Data.remove(id);
+
+    const { el, darkModeMediaQuery } = theme;
+    EventHandler.off(el, 'click');
+    EventHandler.off(darkModeMediaQuery, 'change');
+}
+
+const changeTheme = id => {
+    const theme = Data.get(id);
+    if (theme === null) {
+        return;
+    }
+
+    if (theme.currentTheme === 'auto') {
+        switchTheme('auto', window.innerWidth, 0);
+    }
 }

src/BootstrapBlazor/Components/ThemeProvider/ThemeValue.cs

@@ -0,0 +1,34 @@
+// Copyright (c) Argo Zhang (argo@163.com). All rights reserved.
+// Licensed under the Apache License, Version 2.0. See License.txt in the project root for license information.
+// Website: https://www.blazor.zone or https://argozhang.github.io/
+
+using BootstrapBlazor.Core.Converter;
+
+namespace BootstrapBlazor.Components;
+
+/// <summary>
+/// 主题选项
+/// </summary>
+[JsonEnumConverter(true)]
+public enum ThemeValue
+{
+    /// <summary>
+    /// 自动
+    /// </summary>
+    Auto,
+
+    /// <summary>
+    /// 明亮主题
+    /// </summary>
+    Light,
+
+    /// <summary>
+    /// 暗黑主题
+    /// </summary>
+    Dark,
+
+    /// <summary>
+    /// 使用本地保存选项
+    /// </summary>
+    UseLocalStorage,
+}

src/BootstrapBlazor/Converter/JsonEnumConverter.cs

@@ -12,34 +12,26 @@ namespace BootstrapBlazor.Core.Converter;
 /// </summary>
 public class JsonEnumConverter : JsonConverterAttribute
 {
-    /// <summary>
-    /// 构造函数
-    /// </summary>
-    public JsonEnumConverter() : base()
-    {
-
-    }
-
     /// <summary>
     /// 构造函数
     /// </summary>
     /// <param name="camelCase">Optional naming policy for writing enum values.</param>
     /// <param name="allowIntegerValues">True to allow undefined enum values. When true, if an enum value isn't defined it will output as a number rather than a string.</param>
-    public JsonEnumConverter(bool camelCase, bool allowIntegerValues = true) : this()
+    public JsonEnumConverter(bool camelCase = false, bool allowIntegerValues = true)
     {
-        CamelCase = camelCase;
-        AllowIntegerValues = allowIntegerValues;
+        _camelCase = camelCase;
+        _allowIntegerValues = allowIntegerValues;
     }
 
     /// <summary>
     /// naming policy for writing enum values
     /// </summary>
-    public bool CamelCase { get; private set; }
+    private readonly bool _camelCase;
 
     /// <summary>
     /// True to allow undefined enum values. When true, if an enum value isn't defined it will output as a number rather than a string
     /// </summary>
-    public bool AllowIntegerValues { get; private set; } = true;
+    private readonly bool _allowIntegerValues;
 
     /// <summary>
     /// <inheritdoc/>
@@ -48,9 +40,9 @@ public JsonEnumConverter(bool camelCase, bool allowIntegerValues = true) : this(
     /// <returns></returns>
     public override JsonConverter? CreateConverter(Type typeToConvert)
     {
-        var converter = CamelCase
-                ? new JsonStringEnumConverter(JsonNamingPolicy.CamelCase, AllowIntegerValues)
-                : new JsonStringEnumConverter(null, AllowIntegerValues);
+        var converter = _camelCase
+                ? new JsonStringEnumConverter(JsonNamingPolicy.CamelCase, _allowIntegerValues)
+                : new JsonStringEnumConverter(null, _allowIntegerValues);
         return converter;
     }
 }

src/BootstrapBlazor/wwwroot/modules/utility.js

@@ -716,7 +716,9 @@ export function getTheme() {
 }
 
 export function saveTheme(theme) {
-    localStorage.setItem('theme', theme)
+    if (localStorage) {
+        localStorage.setItem('theme', theme);
+    }
 }
 
 export function getAutoThemeValue() {

test/UnitTest/Components/ThemeProviderTest.cs

@@ -21,17 +21,29 @@ public void ThemeProvider_Ok()
     [Fact]
     public async Task OnThemeChanged_Ok()
     {
-        var name = "";
+        var v = ThemeValue.Auto;
         var cut = Context.RenderComponent<ThemeProvider>(pb =>
         {
-            pb.Add(a => a.OnThemeChangedAsync, t =>
+            pb.Add(a => a.OnThemeChangedAsync, val =>
             {
-                name = t;
+                v = val;
                 return Task.CompletedTask;
             });
-            pb.Add(a => a.Alignment, Alignment.Center);
         });
-        await cut.Instance.OnThemeChanged("dark");
-        Assert.Equal("dark", name);
+        await cut.Instance.OnThemeChanged(ThemeValue.Dark);
+        Assert.Equal(ThemeValue.Dark, v);
+    }
+
+    [Fact]
+    public async Task ThemeValueChanged_Ok()
+    {
+        var v = ThemeValue.Auto;
+        var cut = Context.RenderComponent<ThemeProvider>(pb =>
+        {
+            pb.Add(a => a.ThemeValue, ThemeValue.Light);
+            pb.Add(a => a.ThemeValueChanged, EventCallback.Factory.Create<ThemeValue>(this, val => v = val));
+        });
+        await cut.Instance.OnThemeChanged(ThemeValue.Dark);
+        Assert.Equal(ThemeValue.Dark, v);
     }
 }